Quote:
Originally Posted by timasdf
It doesn't.
That's when the double-whistle is to be used.
Rule 5-5-3b.13
Keep in mind that the specific timing of warmups is not an NFHS rule. Those are determined by the state (or in rare cases, the league).
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That rule deals with timing / warnings for TOs. I was reluctant to automatically extend it to warm-ups
And, if the book(s)
don't cover it, that explains why I couldn't find it during a quick perusal.